Designed as an alternative to the traditional coach screw mainly used for timber to timber applications. Wafer head for improved clamping and a low profile finish. Stainless steel must be used where there is corrosive environment and/or the base material has inherent corrosive characteristics e.g. Green Oak. Wafer head countersunk and TX40 recess Stainless Steel offers superior corrosion resistance, perfect for highly corrosive environments Helix shank for removing debris and to improve clamping Single slash point to reduce torque and the risk of timber splitting at low edge distance 25 sharp point and single lead for a fast start and improved thread acceptance" Thread Dia. mm: 8.0 Length mm: 80 Thread Length mm: 40 Head Type: Wafer Recess Type: TX Drive Driver Bit Size: TX40 Point Type: 25 Sharp with Single Slash Finish: N/A Material: Austenitic Stainless Steel (A2-304)Size 8.0 x 80 - 20 Pieces Timco Timber Frame Construction & Landscaping Screws - Wafer - A2 Stainless in Silver